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CORROSION INFORMATION

Quik Drive® Screw Coatings/Materials updated 8/13/10

Coatings

Class 3 (as per AS3566.2) Mechanically Galvanised
Mechanical plating with zinc/tin which complies with AS3566.2 – 2002 according to Table 2.

Class 4 (as per AS3566.2) Mechanically Galvanised
Mechanical plating with zinc/tin which complies with AS3566.2 – 2002 according to Table 2.

Clear Zinc
Coating offers minimum amount of corrosion protection and is intended for dry, non-corrosive applications only.

Gray Phosphate
Coating offers minimum amount of corrosion protection and is intended for dry, non-corrosive applications only.

Heavy Zinc Electroplate
Electroplate galvanization which coats the base metal with a combination of zinc and chromate.

Thickness of the coating is in accordance with ASTM A 641 class 1 to provide extra corrosion resistance. Coating offers minimum amount of corrosion protection and is intended for dry, noncorrosive applications only.

 N2000® Mechanically Galvanised
Mechanical galvanization provides a protective zinc coating over base metal.

The coating is applied by mechanically tumbling zinc powder with the base metal and non-metallic impact beads. Less than 10% surface red rust at 1000 hours of ASTM B117 salt spray test.

 Quik Guard®
Quik Guard is a proprietary double barrier coating that provides a level of corrosion protection suitable for many preservative-treated timber applications. Less than 10% of surface red rust at 950 hours of ASTM B117 salt spray test. See "Minimum Coating or Material Recommendation" below for further information regarding deck applications using preservative-treated lumber.

TufCote®
A 20-25 microns thick cationic epoxy electrocoat. Less than 10% surface red rust at 300 hours of ASTM B117 salt spray test.

Yellow Zinc Dichromate
Coating offers minimum amount of corrosion protection and is intended for dry, non-corrosive applications only.

Stainless Steels

 305 Stainless Steel
305 stainless steel is a nickel chromium austenitic grade of stainless steel and is inherently non-magnetic. This material is not hardened by heat treatment and provides very good corrosion protection. No visible sign of surface red rust at 1000 hours of ASTM B117 salt spray test.

 316 Stainless Steel
316 stainless steel is a nickel chromium austenitic grade of stainless steel and is inherently non-magnetic. This material is not hardened by heat treatment and provides the highest level of corrosion protection. No visible sign of surface red rust at 1000 hours of ASTM B117 salt spray test.

410 Stainless Steel
410 stainless steel is a low-carbon martensitic grade of stainless steel and is inherently magnetic. This material resists corrosion in mild atmospheres and many mild chemical environments.

This teal arrow is used throughout Simpson Strong-Tie materials to indicate products with additional corrosion protection, making them suitable for use in some corrosive environments and with some preservative-treated timbers. See corrosion information and material recommendations for more information.

General note about salt spray testing: Salt spray testing in accordance with ASTM B117 is not intended to represent real world corrosion performance of screw coatings. It should only be used for comparative evaluation between like products. Many variables may affect the outcome of the salt spray test, such as screw features, coating types, post coating processes, etc.

TufCote® is a registered trademark of Sheh Fung Screws.
N2000® is a registered trademark of Mechanical Galv. Plating Corporation.

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